Diy Esr meter v2

[@EJEuth]

Nicely constructed and creative solutions in it!

[@mohsentabouna6401]

can this be used to test in circuit please ?

[@johnbravo7542]

@@mohsentabouna6401 No

[@sergeypetrov1358]

✋Давно занимаетесь радиоделом👍👍👍

[@beladn710]

Nice job bravo, can you tell me about your etching chemicals and your oxygenation system?

[@junkyard_engineering]

Please see my video about how to make PCB at home

[@beladn710]

Ah ,thank you Nguyen

[@peterlarkin762]

Brilliant, looking for an esr meter circuit for while. Thank you!

[@junkyard_engineering]

You are welcome. Hopefully it's useful for you.

[@pifpoche2945]

Bravo

[@pifpoche2945]

👏

[@vernonbosshard9317]

Is that toner printed on some heavy paper, I like they was it transfers. I ask because I used to work at an etching manufacturing facility, we used Ferric chloride, and kodak photo resist. We did not make PCBs, we made industrial name plates.

[@junkyard_engineering]

The inject gloss photo paper from Officeworks is good for transfer. It is easy to transfer the toner to the copper board with the iron. It is good for PCB. I not sure about the nameplate.

[@lww3988]

Thanks for making the 2nd generation tester, may I ask you, when on the board, what is the actual voltage applied across the capacitor under test? Will it lead to conduction of other semiconductors? Greetings from Taiwan fans, thank you

[@junkyard_engineering]

I believe that is about 5mv

[@junkyard_engineering]

Thank you. Good luck with the project.

[@lww3988]

@@junkyard_engineering Thanks

[@SCHRE1END]

Gracias amigo 😊

[@MrTodopic]

Very thanks!!!

[@junkyard_engineering]

No worries. Hope it is useful for you.

[@radiotvrepair1059]

Thanks 🙏🙏🙏 this ESR meter is 100 kHz

[@junkyard_engineering]

Yes. This one is 100khz. You are welcome.

[@ivangheorghe7794]

Hi! I like your video and the way you have build your ESR meter. I want ask you for something: During the video you said: "be careful with the 470pf capacitors." What means that ? Is that for capacitors type and their quality? I also saw that you haven't used the the second part of the circuit ,the buzzer one. Can you please to tell me what kind of ceramic capacitors have you used in your circuit? Sorry for my English! Thank you!

[@junkyard_engineering]

Thank you. Please use high quality low lost capacitors. I used NPO ceramic capacitors. For some reason that I can't make the buzzer work. It put load on the circuit made the circuit unstable.

[@ivangheorghe7794]

@@junkyard_engineering Thank you a lot!

[@junkyard_engineering]

@@ivangheorghe7794 No worries.

[@lww3988]

@@junkyard_engineering Sorry, I have to ask you how to correct the actual circuit diagram that does not use the buzzer (eg omit C5/C6/C7...)? Sorry, my English is not good, I hope you can understand me, thank you very much!

[@junkyard_engineering]

@@lww3988 yes. Omit all the components about the buzzer ( I circled and crossed out)

[@vernonbosshard9317]

What are you etching it with?

[@junkyard_engineering]

Ferric chloride please see my other videos about PCB at home

[@RixtronixLAB]

Nice video, thanks :)

[@junkyard_engineering]

You are welcome. :)

[@zezozac8495]

Hello friend Can I replace TL082 with TL072 ? If not then there's any equivalent to TL082? I can't find TL082 in my area 😢. thanks for help

[@junkyard_engineering]

I never try it. But I don't see any reason why not. You can try it.

[@junkyard_engineering]

Becarefull with all the fake new opamps out there. Buy from a reliable source. I am lucky that I inherited all my parts from my uncle.

[@zezozac8495]

They had same specifications TL072 and TL082 ?

[@junkyard_engineering]

@@zezozac8495yes. I believe so.

[@mohsentabouna6401]

can this be used to test in circuit please ?

[@junkyard_engineering]

Yes. It can do that. Just remember to discharge the cap before measure

[@mohsentabouna6401]

@@junkyard_engineering isn’t the output voltage too high and can trigger transistors ?

[@junkyard_engineering]

The voltage at the test leads is 5mV. It can't trigger any transistor.

[@syedraza7277]

.dear..can u please share parts detail....if u dont mind..

[@junkyard_engineering]

Please download the schematic in the show more tab. That are all I have for this project. Thank you.

[@bussypaul7326]

I have constructed your esr meter using your schematics and pcb design. But it's not working!! No idea what gone wrong! The only suspect is the IC! No oscillation! Thanks!

[@junkyard_engineering]

Sorry to hear that. I tested it works on the bread board. But when I put it on the PCB, it didn't work. I found that I swapped the position of the two 470p capacitors each other. I swapped it back again, it works. I think the two capacitors are important. It should be good quality npo or mica capacitors. That is my opinion. Hopefully I t will help

[@bussypaul7326]

Thanks! Will do that!

[@junkyard_engineering]

@@bussypaul7326 No worries.

[@bussypaul7326]

As I suspected, the IC was the culprit! Changed the IC purchased from a reputed seller and the meter works well! Thank you so much for the project and your great support! Love from INDIA!

[@junkyard_engineering]

@@bussypaul7326 I am glad to hear that. You are welcome.

[@劉志偉-h2r]

😀

[@isidoromaich7226]

Versión mejorada

[@clauscaio6367]

Bravo